Poliuretanowe lakiery proszkowe modyfikowane związkami fluoru

B. Pilch-Pitera

Published : 2012-12-30

Vol. 57 No. 11-12 (2012)

Polyurethane powder lacquers modified with fluorine compounds

B. Pilch-Pitera

Abstract

Polyisocyanates, used as crosslinking agents in powder lacquers, were synthesized in the reaction of diisocyanates, formic acid, fluorinated alcohols and imidazole. The structure of polyisocyanates was confirmed using IR, 1H NMR, 13C NMR and 19F NMR spectroscopy and the molecular weight distribution (MWD) was determined by gel permeation chromatography (GPC). The course of the unblocking and curing reactions was investigated by differential scanning calorimetry (DSC) and thermal analysis (DTA and TG). The prepared lacquer coatings containing fluorine exhibit higher values of contact angle for water, formamide and diiodomethane as well as lower surface free energy parameters compared to unmodified coatings. They also show improved application properties such as impact resistance, hardness, adhesion to steel surface and abrasion resistance.

Keywords

poliizocyjaniany ; poliuretanowe lakiery proszkowe ; modyfikacja właściwości powierzchni ; fluorowane lakiery polyisocyanates ; polyurethane powder lacquers ; surface properties modification ; fluorinated lacquers

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Pilch-Pitera, B. (2012). Polyurethane powder lacquers modified with fluorine compounds. Polimery, 57(11-12), 830–838. Retrieved from https://ichp.vot.pl/index.php/p/article/view/879

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